Delhi Police Constable practice question
The volume of a right circular cylinder is 4928 cm³ and its height is 2 cm. Find the radius of its base. (Use π = 22/7)
From a Delhi Police Constable Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (D) 28 cm
V = πr²h ⇒ 4928 = (22/7) × r² × 2 ⇒ r² = 4928 × 7 / (22 × 2) = 784 ⇒ r = 28 cm.
हिंदी में प्रश्न
एक लम्ब वृत्तीय बेलन का आयतन 4928 cm³ है और उसकी ऊँचाई 2 cm है। इसके आधार की त्रिज्या ज्ञात करें। (π = 22/7 का प्रयोग करें)
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (D) 28 cm
V = πr²h ⇒ 4928 = (22/7) × r² × 2 ⇒ r² = 4928 × 7 / (22 × 2) = 784 ⇒ r = 28 cm।
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